Preheat oven to 350 degrees F. Heat oil in a large saute pan over medium-low heat. Add garlic and cook until soft and golden, about 1 minute. Add diced tomatoes with juice, tomato sauce, red peppers, chili peppers, cumin, coriander and 1/4 teaspoon each salt and pepper. Bring to a boil, then reduce heat to medium-low and simmer for 10 minutes until sauce thickens slightly. Remove from heat, and remove chile peppers.